Let Verticator know this by setting 'darktheme' to true.
Replace the colors to your liking.
Reveal.initialize({
...
verticator: {
darktheme: true,
color: 'yellow',
oppositecolor: 'red'
},
plugins: [ Verticator ]
})
This slide has a light data-background attribute.
This slide has a dark data-background attribute.
It has no effect on the Verticator bullets, because the theme is already dark.